In the Outer Limits episode, Think Like A Dinosaur, teleportation means copying someone, and disposing of the original.

What if Project: Rebirth worked like that: it didn't make Steve stronger, it just made a bigger, stronger copy, based on the blueprints of small-Steve? And everyone is told they have to dispose of the leftovers.

Obviously, that's not what happens.

So, what do you do with two Steves? (Answer: Sex. Probably.)